Reamer Bits

When completing high-performance projects that require the forming of precise holes in or through materials, the sides of the hole may require additional work to ensure they are completely smooth. In this case, reamers are designed to completely smooth the hole to a high degree of accuracy.


Due to the removal of the uneven material, reaming will slightly enlarge the hole you have created, therefore making it advisable to form the initial hole fractionally smaller to allow for the reaming space – this is called the allowance. It is recommended that the drilled hole should not be enlarged by more than 5% of the drilled diameter.


Typically made from carbide or high-speed steel (HSS), these multi-edged rotary cutting tools are used in metalworking for enlarging and finishing holes to a high level of precision and accuracy.


What types of reamer are there?


At RS Components, we have both machine reamer bits and hand reamer bits. The main difference between the two is that hand reamer bits have a longer taper or lead in at the front end of the bit, which compensates for the difficulty of using hand power alone.


Straight reamer bits are used to make only minor enlargements to holes, typically ones used for the force-fitting of location dowel pins or for unthreaded shoulder bolts.


With helical/spiralled reamer bits, a clockwise reamer will pull any debris up and out of a blind hole, whereas an anti-clockwise reamer will push debris forward, which can be helpful when creating a through-hole.


A tapered reamer is used to make a tapered hole for a tapered pin, which is a self-tightening device due to the shallow angle of the taper. They are commonly used in aircraft assembly and may only be re-reamed a small number of times during an aircraft’s career.


Combination reamers have two or more cutting surfaces, cut to resemble the part’s multiple internal diameters. Using combination reamers reduces the number of separate operations as well as precisely creating relative depths and diameters.


Adjustable reamers consist of several blades along a tapered groove that can be adjusted to cover a small range of hole sizes. They are restricted to light usage due to the absence of any spiral in the flute, meaning they will only remove minimal material for each diameter setting, and cannot be used in holes that have an axial split.


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Omschrijving Prijs Shank Type Diameter Overall Length Material
RS-stocknr. 394-251
FabrikantRS PRO
70,67 €
Each
Aantal stuks
Straight 9.25 → 10mm 115 mm HSS
RS-stocknr. 394-302
FabrikantRS PRO
119,54 €
Each
Aantal stuks
Straight 19 → 21mm 180 mm HSS
RS-stocknr. 394-267
FabrikantRS PRO
65,19 €
Each
Aantal stuks
Straight 10 → 10.75mm 125 mm HSS
RS-stocknr. 394-285
FabrikantRS PRO
87,51 €
Each
Aantal stuks
Straight 13.75 → 15.25mm 150 mm HSS
RS-stocknr. 188-2506
FabrikantRS PRO
75,10 €
Each
Aantal stuks
Morse Taper 26mm 184 mm HSS
RS-stocknr. 394-289
FabrikantRS PRO
80,53 €
Each
Aantal stuks
Straight 12.75 → 13.75mm 145 mm HSS
RS-stocknr. 394-245
FabrikantRS PRO
62,04 €
Each
Aantal stuks
Straight 7.75 → 8.5mm 100 mm HSS
RS-stocknr. 188-2502
FabrikantRS PRO
45,46 €
Each
Aantal stuks
Morse Taper 12mm 152 mm HSS
RS-stocknr. 188-2503
FabrikantRS PRO
48,27 €
Each
Aantal stuks
Morse Taper 14mm 152 mm HSS
RS-stocknr. 188-2504
FabrikantRS PRO
56,28 €
Each
Aantal stuks
Morse Taper 16mm 167 mm HSS
RS-stocknr. 394-273
FabrikantRS PRO
54,25 €
Each
Aantal stuks
Straight 7 → 7.75mm 90 mm HSS
RS-stocknr. 188-2509
FabrikantRS PRO
75,10 €
Each
Aantal stuks
Morse Taper 1in 7-1/4 in HSS
RS-stocknr. 394-291
FabrikantRS PRO
95,72 €
Each
Aantal stuks
Straight 17 → 19mm 170 mm HSS
RS-stocknr. 188-2505
FabrikantRS PRO
69,64 €
Each
Aantal stuks
Morse Taper 22mm 184 mm HSS
RS-stocknr. 394-241
FabrikantRS PRO
64,91 €
Each
Aantal stuks
Straight 8.5 → 9.25mm 105 mm HSS
RS-stocknr. 188-2501
FabrikantRS PRO
41,40 €
Each
Aantal stuks
Morse Taper 10mm 127 mm HSS
RS-stocknr. 188-2507
FabrikantRS PRO
41,40 €
Each
Aantal stuks
Morse Taper 3/8in 127 mm HSS
RS-stocknr. 394-239
FabrikantRS PRO
141,70 €
Each
Aantal stuks
Straight 21 → 23mm 85.72 mm HSS
RS-stocknr. 188-2508
FabrikantRS PRO
45,46 €
Each
Aantal stuks
Morse Taper 1/2in 5-15/16 in HSS
RS-stocknr. 394-279
FabrikantRS PRO
74,35 €
Each
Aantal stuks
Straight 11.75 → 12.75mm 130 mm HSS